FO2 is the fraction of oxygen or the % Oxygen. PO2 is the partial pressure of oxygen.
What is PO2 for diving?
As of September 5, 2015, the NOAA Diving Program’s maximum oxygen partial pressure (PO2) level was reduced from 1.6 ATA to a maximum of 1.4 ATA. This PO2 level is currently the standard in the military and other federal, civilian and the vast majority of academic diving programs.
Why is nitrox better for diving?
Divers who use nitrox absorb less nitrogen, making them stay underwater for longer. They’re also less likely to get decompression sickness. It’s worth noting that older divers and those who’ve experienced decompression sickness or physical injuries can reduce no-decompression limits with the gas.
How deep can you dive with nitrox?
However, when diving on nitrox, the potential for oxygen toxicity lurks well within the depth range of recreational diving: the maximum depth on 32 percent nitrox is 121 feet; on 36 percent nitrox, it’s just over 100 feet. Many divers regularly cruise at these depths and even deeper without giving it a second thought.
What is FO2 and PO2?
FO2 is the fraction of O2 in the gas you are breathing. Air has an FO2 of 0.21. It will always be that number at any depth. PO2 is the partial pressure of Oxygen.It changes with depth.
What does 1.4 ATA mean?
1.4-1.6 ATA is the range of partial pressure where oxygen becomes harmful.
Does nitrox make you less tired?
Despite the common impression that diving on nitrox may cause less fatigue than performing the same dive using an air mixture, scientific research to date has not found solid evidence to support such an assumption. As mentioned, the placebo effect should not be underestimated and has yet to be fully studied.
Is it worth getting nitrox certified?
Is a nitrox certification “worth it”? If you fancy staying down longer and getting back in the water sooner, then yes; getting nitrox certified is worth it. You can take more photos, wave to more turtles, and spend more time exploring at depth. Many divers wait too long to try nitrox.
When should you not use nitrox?
If nitrogen causes narcosis and you’re breathing less of it, you should have less narcosis. The trouble is, the depth range where you start worrying about narcosis (100 to 130 feet) is also where you have to stop using nitrox because of the risk of oxygen toxicity.
As stated, when you dive using nitrox you can take advantage of increasing your maximum allowable bottom time. This happens because the extra oxygen added to your breathing gas when it was filled has displaced nitrogen.
Can you dive longer with nitrox?
Therefore, even diving with Nitrox, this diver can only dive for maximum 30 minutes regardless of how much time before he reaches the no decompression limit. As a result, diving with nitrox does not offer a longer dive time for this diver. Diving with Nitrox reduces the risk of decompression sickness.
Is Nitrous the same as nitrox?
Medical Moderator. Nitrous oxide and Nitrox are different gases and are not related. Nitrox is air that has been “enriched” with the addition of more oxygen. The net effect is to reduce the nitrogen present in the breathing mixture to help avoid some of the problems associated with breathing nitrogen at depth.
What is ideal PO2?
Most healthy adults have a PaO2 within the normal range of 80–100 mmHg. If a PaO2 level is lower than 80 mmHg, it means that a person is not getting enough oxygen . A low PaO2 level can point to an underlying health condition, such as: emphysema.
What is PO2 in nitrox?
PO2 is the partial pressure of oxygen. P is the absolute pressure (depth divided by 10+1) The forward slash / is divided by. FO2 x P = PO2 = Fraction of oxygen x pressure = partial pressure of oxygen = Oxygen Dose. PO2 / FO2 = P = partial pressure of oxygen / Fraction of oxygen = pressure = Depth.
What should I set my PO2 to?
While different dive computers have different default settings for both the oxygen percentage in the mix and the maximum PO2, most default settings tend to be conservative. In many cases, the default setting for the percentage of oxygen will be 21% while the default setting for PO2 is often 1.4.